Platform for window-washers



P. REINWALD.

PLATFORM FOR WINDOW WASHERS.

APPLICAT|0N FILED MAR. 13. 1919.

1 18 Patented Dec. 1920.

Mgr- 11 v f I 18 l WITNESS 8 5 I 3 INVENTOR MW 25- I 15 v PauZ-IicznwaZdm a; ugly ATTORNEYS UNITED STATES.

PAUL REINWALD, OF MENLO PARK, CALIFORNIA.

rmvrronivi FOR WIND OW-WASHERS.

Application filed March 13,

To all whom it may concern:

Be it known that 1, PAUL REINWALD, a citizen of the United States, and aresident of Menlo Park, county of San Mateo, and State of California,have invented a new and useful Platform for Window-Washers, of which thefollowing is a specification.

My invention relates to platforms for the use of window washers, and anobject of the invention is to provide a safe light platform which isreadily attached to and detached from the sill and casing of a window topermit easy access to the outside of the window.

The invention possesses other objects and features of advantage, some ofwhich, with the foregoing, will be set forth in the followingdescription of the preferred form of my invention which is illustratedin the drawings accompanying and forming part of the specification. Itis to be understood that I do not limit myself to the showing made bythe said drawings and description, as I may adopt variations of thepreferred form within the scope of my invention as set forth in theclaims.

Figure 1 is a plete platform.

Fig. 2 is a vertical sectional view through one of the cantaliver arms,the plane of section being taken through the lines 2-2 of Fig. 1.

Fig 3 is an elevation of a portion of the anchor bar of my device.

The device of my invention is'a means for providing a safe platform uponwhich a person may stand while washing the outside of windows. It isapplicable to windows having sills of any width,but is especiallysuitable for use in connection with narrow sills such as are usuallyfound in the small public buildings and in private homes. Although itfacilitates the work to be done by providing a stable platform for boththe worker and a pail, its chief value lies in the perfect securitywhich it gives and the consequent avoidance of accident. It is appliedto a window by merely pushing the assembled structure through theopening left by raising the lower sash, and requires no fittings orattachments secured to the casing or sill. In order to facilitatestorage and carrying from place to place, it is formed of members whichare readily separated and assembled.

The platform proper comprises a pair of perspective view of the com- ISpecification of Letters Patent.

Patented Dec. 7, 1920.

1919. Serial No. 282,266.

cantaliver arms 3 having vertical posts 4 secured at their outer ends.Preferably each post is mortised into the corresponding arm andreinforced by the angle bar 5 overlying the arm and portion of the postand secured thereto by screws. Another angle bar 6 is fixed at the topof each post and a railing comprising side rails 7 and front rail 8which are independently fixed together is detachably arranged on the topof the posts by means of screws 9 passing through angle bars 6 and siderails 7 and secured by the wing nuts 11. A footing board 12 upon whichthe worker stands is similarly detachably engaged with the cantaliverarms by screws and wing nuts 13.

Fixed on the under side of each cantaliver arm in position to engage theslanting window sill 1 1 is a post 15, preferably cut to lie fiat on thesill. The posts transfer the downward thrust of the platform and itsload to the sill, and it will be seen that stress on the cantaliver armssuch as is caused by the presence of a load thereon, will tend to tipthe arms downwardly about the outer edge 16 of the posts 15. Means aretherefore provided to prevent the upward movement of the inner lever armformed by that portion of the cantaliver on the inside of the posts 15,and thus stabilize the cantaliver arms and enable them to carry a load.On the end of each arm 3 is rigidly fixed a T-bar 17, the head of whichis adapted to be inserted behind the plates 18 fixed on the anchor bar19. The anchorbar is formed with recesses 20 to permit the T-bar headsto be placed behind the plates, and a plate 21 is hinged to the anchorbar and adapted to lie between the cantaliver arms to lock the T-bars inthe recesses behind the plates 18. By removing the railing, and footingboard and raising the plate 21, the cantaliver arms may be disengagedfrom the anchor bar. The anchor bar is faced with a layer of felt 22about its ends.

.In order to prepare the parts are assembled as shown in Fig. 1 andpushed out of the window to the position shown in Fig. 2, the posts 15resting on the outer edge of the sill and the anchor bar traversing thewindow casing, its padded ends bearing against the inside facing of thecasing. In this position the cantaliver arms oannot rock about the edges16 of the posts, since such motion must result in an upward slidingmovement of the my device for use, 1

anchor bar on the WlIlClOW casing, accompanied by an inwardmovement ofthe posts. 7

ders this movement impossible, and the plat-- form is found perfectlystable.

I claim:

1. In a platformadapted to be extended from a Window, cantaliver arms,means for supporting said arms on the Window sill, an anchor bar forengaging the inside face of the Window casing, meansfor releasablyattaching said arms to said bar, and a foot-.

ing board releasably arranged on said arms to provide a floor for theplatform, and stop means on the anchor bar and between the arms toprevent the release of the arms from said anchor bar.

2. In a platform adapted to be extended from a Window, eantaliver arms,means for supporting said arms on the Window sill,

an anchor bar releasably attached to said arms for engaging the insideface of the WindoW casing, a footing board and a railing arranged onsaid arms, and a plate hinged Ihe slanting sill of the Window casingrenon said bar to rest between said arms and prevent lateral movementand the release of the arms from said bar.

3. In apl'atform adapted to beextended from a Window, c'antaliver arms,mean'sfor supporting said arms on the Window sill, an anchor barprovided with recesses and fixed lock plates, and

Window casing, T-bars on said arms with heads, adapted to be inserted inthe recesses and engaged behind said fixed hinged on said anchor bar forpreventing the disengagement of said T-bars from said fixed leasablyengaged With said arms,.-a post on each of said arms and a railingengaged with said post. 7 r

In testimony whereof, I have hereunto set my hand at San Francisco,California, this 5th day of March, 1919.

PAUL 'REINWALD.

In presence of C. S..EVANS.

engaging the inside plates,a footing board re-. 2

